Solve this equation using the elimination method. 4x+2y=-6 -3x-2y=7 (?,?)

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Which expression is rational? 6. , square root two, square root 14, square root 49